Rubber valve for pumps and the like.



T.-HOWLAND. RUBBER VALVE ron PUMPS AND THE LIKE.

AAAAAAAAAAA II' L E D M AR.13, i912. 1 040,334. Patented Oct. 8, 1912.

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am wm 1omas flow l und MWLJlZ also Wear to one Sitllas well.

TED iSlllllQl-Eil lcbl'lENT OFFICE.

THOMAS nommm, 0 MACHAII, QUEENSLAND, AUSTRALIA.

EU'E'BKB VALVE F03 FU'EKPS AND THE LIKE.

Bpeciflmtinn 01' Letters Patent. w rm-mm mirth It's,

latcnfcd Oct 8.1912.

1912. Ber-1a! no. 683.449.

To (1H whom ii 1mg; wriwm: a

Be it known that I, 'l'nonnu Howm'so. 3 subject of the King of Great Brilain and Ireland, &c.. residing at lllacltay, in the State of Queensland, Commonwealth of Australia, have invented certain new and useful In: I provements in Rubber "fair es for Pumps and the Like; and I do hereby declare the following to be 1 full, clear. and exact description of the invention, such as will enable others skilled in the art to which it np p rtains to make and use the same.

In many pumps there are now used rul ber disk suction valves which arc centrally f performed. each of which is during the operation of pumping: required to bend or lift 5 around its circumferences. whilethe whole economy. 1

lt necessary. in order to put a ring into position. to bend the valve. uising :1 holder such as u vise. My valve ring only be somewhat V Shaped in ocction. or dished. The top and bottom in each ca e may be flat like :2 washer. or slope obliquely. with rounded sides. The groove in the rubber is J hupc l to correspond. The ring is not required I) be a tight fit. as it will hold in position by reason of its depth.

My ring. according to my experiment insures moriwater being pumped with :1

using: a plain rubber disk: and I have taken a valve which had the central hole worn too large for use. and by making a deep groove volume may 311%) lift to a slight extent its con" i in euch hole. and Inserting a ring. 1 have tel =sliding along a boss or stem. 'l hlue. valves work excellently at first, when new. found that therolvessoiniproved would last but wear lffllKQS plilfii? lllUllllti lll of ill? long-pr than 3 new plain rubber (mg These control hole. which thus enlarges and may rings Stopped the valves; from becoming The col lotornlly displaced and by insuring proper quence is considerable leakage or losr soiling. caused good suction and (liFchnrge. P p g y, with l 'l li of lll 1 The ring isof much morc'dumble matepmnping 50 that valves may be overhauled.

As aremedy the of :2 bush of harder material within the rubber hole has been proposed and I have tried a frrrule or lining of metal, These drgvioes however were n oum'l which it set. It will have to move satisfactory. Tl burn now found thnl r1, Iairly L nightly up and down the spindle and should narrow and (lee set ring will give superior do this easily, and by taking the wear. it resulls. Each ring must be embedded or set '1 thus promotes the life not only of the rubber in a fairly deep ore in the middle of the but also of the hose. My ring can be used rubber. the visib e edges of the ring coining not only in those rubber valves that rotate about flush will) the periphery oi llstrdii lil'lle at PilCll pulsation, but also in others. hole. The success of this construction is du. in the drawings herewith are illustrated to the fact that although ill-c valve coo bend l uuuhinzitiom; of Pilllo' in accordance with to and fro freely there is not the slightest l my im'cnlion. danger of displaoenienl off the ring or rings Figure 1 shows a sectional view through of rnelal or'somo material much more tlu- :1 uuctiou valve and its atlarhmente. Fig. '2 ruble than rubber in such as situation. The a perspective view on an enlarged scale groove by its depth aids the bending of the shmring a wearlaking ring before insertion. rubber and thus improves its action, thick Figs. 3 and {l are sectional views of modirubber valves hitherto used having been ficalions. found to so strongly mist the compression 1. 2 indicates valve seating. 3 a boss or of their fibers during the opening as to be central spindle. 4 a guard, and 5 a' rubber deemed objectionable bf some enginccrS on valve. which in practice is in some cases that account. When a ring begins to a malarger than is drawn. Its central hole is terial extent to SllOW wear it may be marked 6. In the walls of that hole a cenpromptly discarded, as the rings will be tral or nearly central deep groove 7 is cheap. and the cost of now ones from time maoe sbown deeper than it is high. It to t me will be negligible. These rubber is advisable to have the upper side of the valves will stand considerable preure. groove beveled or rounded oil on its edge '8, They may be of large diameter, and being the form of the opposite edge not muttering. than comparatively expensive. the leugthen- 9 is a rounded edge on the other circumnecessarily so. It is however important that hall not be, of such hard material 3Q to "and into and wear the boss or spindle ing of the life of u valvoprotluces further ,ri on lillillllliy of fuel than 15 pumped when rial than rubber and may be of metal but not ference of the ring. The ring is shown in Fig. 1 with top and bottom "faces tapering as at 10 or narrowing toward outer edge 9.

In Fig. 3 the ring is dished, its sides 1O sloping or extending upward toward edge 9; these sides could be made to taper as in Fig. 1. The ring of Fig. Q has flat sides as marked 10. The inside ed e ll of each ring is rounded, and incloses tne boss 3 but, not tightly, the rubber also not'being tight around the boss.

The thickness of the valve rubber above and below the ring is shown as considered by me to be most advantageous, and thus the ring thickness is, at its maximum, about a third of the thickness of the rubber, but may be thinner.

\Vhat I claim is 1. In rubber disk suction valves having a central hole to inclose a boss a deep narrow groove at or near the middle of the said hole, in combination with a ring having rounded inner and outer edges and of more durable niaterial than rubber, and adapted to become worn by the said boss and to be renewed as indicated. V

2. l he combination of a rubber disk suction valve having a central hole therethrough with a com qaratively deep narrow groove at or near the middle of said hole, with an annular ring of more durable material than rubber fitting within said hole, the inner diameter of said ring being slightly less than the diameter of the hole through the valve.

3. The combination with a rubber disk suction valve having a hole therethrough and having a relatively deep narrow groove at or near the middle of said hole, of a ring having substantially fiat parallel sides with rounded inner and outer edges fitting within said groove.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

THOMAS HOWLAND.

Witnessest i WuLIAM ALFRED WRIGHT, ANDREW RICHARD AVENELLQ 

